EP0715086B1 - Device for fastening an element on a body of a motor vehicle - Google Patents

Device for fastening an element on a body of a motor vehicle Download PDF

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Publication number
EP0715086B1
EP0715086B1 EP95118475A EP95118475A EP0715086B1 EP 0715086 B1 EP0715086 B1 EP 0715086B1 EP 95118475 A EP95118475 A EP 95118475A EP 95118475 A EP95118475 A EP 95118475A EP 0715086 B1 EP0715086 B1 EP 0715086B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
nut
tightening
spacer
damping sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP95118475A
Other languages
German (de)
French (fr)
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EP0715086A1 (en
Inventor
Bruno Gaignard
Rémy Monmaneix
Jean-Louis Roumegoux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Systemes dEssuyage SAS
Original Assignee
Valeo Systemes dEssuyage SAS
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Publication date
Application filed by Valeo Systemes dEssuyage SAS filed Critical Valeo Systemes dEssuyage SAS
Publication of EP0715086A1 publication Critical patent/EP0715086A1/en
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Publication of EP0715086B1 publication Critical patent/EP0715086B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/043—Attachment of the wiper assembly to the vehicle
    • B60S1/0441—Attachment of the wiper assembly to the vehicle characterised by the attachment means
    • B60S1/0444—Attachment of the wiper assembly to the vehicle characterised by the attachment means comprising vibration or noise absorbing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B29/00—Screwed connection with deformation of nut or auxiliary member while fastening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
    • F16F1/3732—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape having an annular or the like shape, e.g. grommet-type resilient mountings

Definitions

  • the present invention relates to a device for the fixing of an element on the body of a vehicle automotive (US-A-3,489,312).
  • the invention relates in particular to a device for fixing an element belonging to a mechanism wiper such as for example a support plate of the mechanism.
  • the invention relates, for example, to a device for fixing of the type comprising a screw-nut assembly, the threaded rod passes through a hole formed in a sheet with interposition of a damping sleeve which, in tight position of the device, is compressed axially between an annular radial bearing surface formed on the body of the threaded rod and an annular tightening face of the nut.
  • the damping sleeve is a cylindrical sleeve tubular which during tightening is axially compressed by the corresponding annular surfaces of the screw and the nut which compresses it so as to increase its diameter at the hole in the sheet and so that come to grip axially the opposite faces of the sheet between opposite and crushed parts of the sleeve tubular thus ensuring an "elastic" fixing on prison.
  • the object of the present invention is to provide a new design of a fastening device of the type previously mentioned which helps to remedy these disadvantages.
  • the invention provides a device for fixing according to claim 1.
  • a clamping spacer is arranged axially between the radial bearing surface and the annular face for tightening the nut.
  • FIGS. 1 to 3 show a device for attachment 20 intended in particular to allow attachment "elastic" of an element (not shown) in a hole circular 22 formed in a sheet 24.
  • the element intended to be fixed on the sheet 24 is for example connected to the body 26 with a fixing screw of which the threaded rod 28 is provided to pass through the hole 22 and cooperate with a hexagonal tightening nut 30.
  • the nut 30 is located above the upper face 32 of the sheet 24 while the threaded rod 28 defines with the body 26 an annular radial shoulder support 34 which extends opposite the underside 36 sheet metal 24.
  • a cushioning sleeve 38 made of elastomeric material or rubber is interposed between the threaded rod 28 and hole 22.
  • the sleeve 38 is constituted by a cylindrical skirt annular 40 and by a radial collar 42 whose face upper 44 is provided to come into abutment against the underside 36 of the sheet 34 and whose underside 46 extends opposite the radial shoulder 34 of screw 26, 28.
  • a clamping washer 48 is interposed between the lower annular tightening face 31 of the nut 30 and the annular radial end face 50 of the skirt 40 of the cushioning sleeve 38.
  • the underside 52 of the washer 48 has an embossed chamfer 54 which is intended to cooperate with a corresponding chamfer 56 formed in the vicinity of the free upper end of the internal cylindrical hole 58 of the damping sleeve 38.
  • a axial clamping spacer 60 is interposed between the radial shoulder 34 and the annular tightening face 31 of the nut 30, inside the sleeve 38.
  • the socket 60 has a body in the form of tubular cylindrical sleeve proper 62 of which the upper annular radial edge 64 is provided to come cooperate with the lower annular face 66 of the chamfer 54 of washer 48.
  • the socket 60 is extended by an external radial flange 70, the annular upper face 72 is provided to cooperate with the lower annular face 46 of the damping sleeve 38 and whose lower annular face 74 is provided for cooperate with the radial shoulder 34 of the screw 26, 28.
  • the outside diameter of the skirt 40 of the sleeve damping 38 is, before axial tightening and like that is illustrated in Figure 2, slightly lower than that of the hole 22 so as to allow the establishment of the screw fitted with spacer 60 and sleeve damping 38 vertically from bottom to top across hole 22.
  • the assembly continues by setting up the tightening washer 48 and nut 30 on the free end of the threaded rod 28 of the screw.
  • This displacement causes axial compression progressive of the damping sleeve 38 including the skirt cylindrical 40 deforms to partially marry the upper face 32 of the sheet 24.
  • the maximum axial clamping position is determined by the abutment of the radial face annular end 64 of the spacer 60 against the face lower annular 66 of the chamfer 54 of the washer tightening 48.
  • a cup 78 for protecting the part compressed upper of the cylindrical skirt 40 of the cushioning sleeve 38 is arranged between the washer clamping 48 and the annular lower clamping face 31 of nut 30.
  • the nut 30 is a conventional nut of shape hexagonal.
  • the nut 30 is a cylindrical nut of bayonet type tightening with lug 80 received in a helical groove 82 of the rod 28 of the body of screw 26.
  • the outside diameter of the cylindrical nut 30 and of the clamping washer 48 are less than the diameter inside the hole 22 of the sheet 24 so as to allow the axial introduction of all the components of the clamping device from bottom to top considering the Figure 5 in hole 22, the operator then no longer having that tighten the nut 30 by causing its rotation to secure the assembly with axial compression of the cushioning sleeve 38 as is illustrated in figure 6.
  • the fixing device differs from the principle explained above in that the shoulder 34 is not formed directly on the body 26 of the screw which ends by the threaded rod but on a ferrule 84 which is supported against the annular face 86 of the hexagon head 88 of the screw.
  • the damping sleeve 38 has a groove 90 of dimension corresponding to that of hole 22 of the sheet 24 and it has a chamfered part 92 facilitating the forced insertion of the sheet 24 into the throat 90.
  • the nut 30 is here embedded inside the sleeve damping 38 and tightening is obtained by screwing the stud 26, 28, 88 which causes, as illustrated in FIG. 8, the axial displacement of the nut 30 in direction of the radial bearing surface 34 causing the compression of the sleeve 38.
  • a washer 94 can be interposed between the radial bearing surface 34 of the shell 84 and the face annular end 46 of the sleeve 38 in order to increase the bearing and clamping surface.
  • a clamping spacer sleeve-shaped axial 60 is arranged inside the cylindrical bore 58 of the damping sleeve 38.
  • the end 68 of the spacer 60 is supported against a washer-shaped collar 70 interposed between the washer 94 and the radial bearing surface 34 of the ferrule 84 while the annular end edge 64 of the socket 60 is likely to come to cooperate with the radial annular tightening face 31 of the sunken nut 30.
  • tubular sleeve 60 is made from material in one piece with the collar 70.
  • the socket-shaped spacer tubular 60 is made integrally with the nut embedded 30 and it extends axially from the radial face tightening ring 31 of the nut towards the washer 94.
  • the present invention can be applied as not limiting to the fixing of an element belonging to a wiper mechanism on the body of a vehicle automobile.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Vibration Prevention Devices (AREA)
  • Springs (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Connection Of Plates (AREA)

Description

La présente invention concerne un dispositif pour la fixation d'un élément sur la caisse d'un véhicule automobile (US-A-3 489 312).The present invention relates to a device for the fixing of an element on the body of a vehicle automotive (US-A-3,489,312).

L'invention concerne notamment un dispositif pour la fixation d'un élément appartenant à un mécanisme d'essuie-glace tel que par exemple une platine de support du mécanisme.The invention relates in particular to a device for fixing an element belonging to a mechanism wiper such as for example a support plate of the mechanism.

L'invention concerne par exemple un dispositif de fixation du type comportant un ensemble vis-écrou dont la tige filetée traverse un trou formé dans une tôle avec interposition d'un manchon d'amortissement qui, en position serrée du dispositif, est comprimé axialement entre une surface radiale annulaire d'appui formée sur le corps de la tige filetée et une face annulaire de serrage de l'écrou.The invention relates, for example, to a device for fixing of the type comprising a screw-nut assembly, the threaded rod passes through a hole formed in a sheet with interposition of a damping sleeve which, in tight position of the device, is compressed axially between an annular radial bearing surface formed on the body of the threaded rod and an annular tightening face of the nut.

Selon un agencement le plus couramment utilisé, le manchon d'amortissement est un manchon cylindrique tubulaire qui lors du serrage est comprimé axialement par les surfaces annulaires correspondantes de la vis et de l'écrou qui le compriment de manière à augmenter son diamètre au niveau du trou dans la tôle et de manière à venir enserrer axialement les faces opposées de la tôle entre les parties opposées et écrasées du manchon tubulaire en assurant ainsi une fixation "élastique" sur la tôle.According to an arrangement most commonly used, the damping sleeve is a cylindrical sleeve tubular which during tightening is axially compressed by the corresponding annular surfaces of the screw and the nut which compresses it so as to increase its diameter at the hole in the sheet and so that come to grip axially the opposite faces of the sheet between opposite and crushed parts of the sleeve tubular thus ensuring an "elastic" fixing on prison.

Ces conceptions connues ne permettent pas de maítriser de manière précise la conformation du manchon d'amortissement en position serrée.These known designs do not allow precisely control the shape of the sleeve damping in the closed position.

Cette absence de maítrise de l'effort de serrage peut aboutir soit à un serrage excessif qui empêche au manchon d'amortissement en matériau élastomère ou en caoutchouc d'assurer son rôle d'amortisseur, soit à un serrage insuffisant qui assure un positionnement insuffisamment précis de l'élément par rapport à la caisse du véhicule. This lack of control of the clamping force can result in either excessive tightening which prevents cushioning sleeve made of elastomeric material or rubber to act as a shock absorber, i.e. insufficient tightening which ensures insufficient positioning precise of the element compared to the body of the vehicle.

La présente invention a pour but de proposer une nouvelle conception d'un dispositif de fixation du type mentionné précédemment qui permet de remédier à ces inconvénients.The object of the present invention is to provide a new design of a fastening device of the type previously mentioned which helps to remedy these disadvantages.

Dans ce but, l'invention propose un dispositif de fixation selon la revendication 1. Selon un mode particulier de réalisation une entretoise de serrage est agencée axialement entre la surface radiale d'appui et la face annulaire de serrage de l'écrou.To this end, the invention provides a device for fixing according to claim 1. According to a particular embodiment a clamping spacer is arranged axially between the radial bearing surface and the annular face for tightening the nut.

Selon d'autres modes particuliers de l'invention :

  • l'entretoise est réalisée sous forme d'une douille coaxiale au manchon ;
  • la douille est agencée à l'intérieur du manchon;
  • la surface radiale d'appui est une collerette annulaire plane qui prend appui contre un épaulement radial de la tige filetée ;
  • la collerette est réalisée en une seule pièce avec la douille ;
  • la douille prend appui axialement contre ladite surface radiale d'appui de la collerette ;
  • une rondelle de serrage est interposée entre la face annulaire de serrage de l'écrou et le manchon d'amortissement ;
  • la face de la rondelle de serrage tournée vers le manchon d'amortissement comporte un profil chanfreiné en relief qui guide la déformation du manchon d'amortissement lors du serrage axial ;
  • en position serrée, l'entretoise prend appui axialement contre une portion en vis-à-vis de la rondelle de serrage ;
  • en position non serrée, les diamètres extérieurs de l'écrou et du manchon d'amortissement sont inférieurs au diamètre du trou ;
  • le diamètre extérieur de la rondelle de serrage est inférieur au diamètre du trou ;
  • la douille est réalisée venue de matière en une seule pièce avec l'écrou ;
  • l'écrou est noyé dans le manchon d'amortissement.
According to other particular modes of the invention:
  • the spacer is made in the form of a sleeve coaxial with the sleeve;
  • the sleeve is arranged inside the sleeve;
  • the radial bearing surface is a flat annular flange which bears against a radial shoulder of the threaded rod;
  • the collar is made in one piece with the sleeve;
  • the sleeve bears axially against said radial support surface of the collar;
  • a tightening washer is interposed between the annular tightening face of the nut and the damping sleeve;
  • the face of the tightening washer facing the damping sleeve has a chamfered profile in relief which guides the deformation of the damping sleeve during axial tightening;
  • in the clamped position, the spacer bears axially against a portion facing the clamping washer;
  • in the non-tightened position, the outside diameters of the nut and of the damping sleeve are less than the diameter of the hole;
  • the outside diameter of the clamping washer is less than the diameter of the hole;
  • the sleeve is produced integrally in one piece with the nut;
  • the nut is embedded in the damping sleeve.

Les caractéristiques et avantages de l'invention apparaítront à la lecture de la description détaillée qui va suivre pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • La figure 1 est une vue en perspective éclatée des principaux composants d'un premier mode de réalisation d'un dispositif de fixation selon l'invention dont certains sont illustrés en arrachement partiel ;
  • la figure 2 est une vue en position assemblée, mais non serrée, des composants illustrés sur la figure 1 ; et
  • la figure 3 est une vue similaire à celle de la figure 2 sur laquelle les composants sont illustrés en position serrée ;
  • la figure 4 est une vue similaire à celle de la figure 3 qui illustre une variante de réalisation comportant une coupelle de protection du manchon d'amortissement ;
  • les figures 5 et 6 sont des vues similaires à celles des figures 2 et 3 qui illustrent une variante de réalisation de l'écrou de serrage axial ;
  • la figure 7 est une vue en section axiale d'un autre mode de réalisation d'un dispositif de fixation selon l'état de la technique, en position non serrée ;
  • la figure 8 est une vue en section axiale similaire à celle de la figure 7 sur laquelle le dispositif de fixation est illustré en position serrée ;
  • la figure 9 est une vue en perspective du manchon d'amortissement intégré au dispositif de fixation illustré aux figures 8 et 9 ;
  • les figures 10 et 11 sont des vues similaires à celles des figures 8 et 9 qui illustrent le dispositif de fixation modifié conformément aux enseignements de l'invention afin qu'il comporte une entretoise de serrage axial ;
  • la figure 12 est une vue en perspective à plus grande échelle qui illustre une variante de réalisation de l'entretoise intégrée au dispositif de fixation des figures 10 et 11 dans laquelle l'entretoise est réalisée venue de matière en une seule pièce avec une collerette d'appui ;
  • les figures 13 et 14 sont des vues similaires à celles des figures 10 et 11 qui illustrent une variante de réalisation dans laquelle l'entretoise est réalisée en une seule pièce avec l'écrou de serrage noyé dans le manchon d'amortissement ; et
  • la figure 15 est une vue en perspective à plus grande échelle de l'écrou de serrage avec son entretoise réalisée en une seule pièce.
The characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the accompanying drawings in which:
  • Figure 1 is an exploded perspective view of the main components of a first embodiment of a fixing device according to the invention, some of which are illustrated in partial cutaway;
  • Figure 2 is a view in the assembled, but not clamped, position of the components illustrated in Figure 1; and
  • Figure 3 is a view similar to that of Figure 2 in which the components are illustrated in the clamped position;
  • Figure 4 is a view similar to that of Figure 3 which illustrates an alternative embodiment comprising a cup for protecting the damping sleeve;
  • Figures 5 and 6 are views similar to those of Figures 2 and 3 which illustrate an alternative embodiment of the axial tightening nut;
  • FIG. 7 is a view in axial section of another embodiment of a fixing device according to the state of the art, in the non-clamped position;
  • Figure 8 is an axial sectional view similar to that of Figure 7 in which the fixing device is illustrated in the clamped position;
  • FIG. 9 is a perspective view of the damping sleeve integrated into the fixing device illustrated in FIGS. 8 and 9;
  • Figures 10 and 11 are views similar to those of Figures 8 and 9 which illustrate the fixing device modified in accordance with the teachings of the invention so that it comprises an axial clamping spacer;
  • Figure 12 is a perspective view on a larger scale which illustrates an alternative embodiment of the spacer integrated in the fixing device of Figures 10 and 11 wherein the spacer is made integrally in one piece with a flange d 'support;
  • Figures 13 and 14 are views similar to those of Figures 10 and 11 which illustrate an alternative embodiment in which the spacer is made in one piece with the clamping nut embedded in the damping sleeve; and
  • Figure 15 is a perspective view on a larger scale of the clamping nut with its spacer made in one piece.

Dans la description qui va suivre, des chiffres de référence identiques seront utilisés pour désigner des composants identiques ou similaires tout au long de la description.In the description which follows, figures of identical references will be used to designate identical or similar components throughout the description.

On a représenté aux figures 1 à 3 un dispositif de fixation 20 destiné notamment à permettre la fixation "élastique" d'un élément (non représenté) dans un trou circulaire 22 formé dans une tôle 24.FIGS. 1 to 3 show a device for attachment 20 intended in particular to allow attachment "elastic" of an element (not shown) in a hole circular 22 formed in a sheet 24.

L'élément destiné à être fixé sur la tôle 24 est par exemple relié au corps 26 d'une vis de fixation dont la tige filetée 28 est prévue pour traverser le trou 22 et coopérer avec un écrou hexagonal de serrage 30.The element intended to be fixed on the sheet 24 is for example connected to the body 26 with a fixing screw of which the threaded rod 28 is provided to pass through the hole 22 and cooperate with a hexagonal tightening nut 30.

L'écrou 30 est situé au-dessus de la face supérieure 32 de la tôle 24 tandis que la tige filetée 28 délimite avec le corps 26 un épaulement radial annulaire d'appui 34 qui s'étend en regard de la face inférieure 36 de la tôle 24.The nut 30 is located above the upper face 32 of the sheet 24 while the threaded rod 28 defines with the body 26 an annular radial shoulder support 34 which extends opposite the underside 36 sheet metal 24.

Un manchon d'amortissement 38 en matériau élastomère ou en caoutchouc est interposé entre la tige filetée 28 et le trou 22.A cushioning sleeve 38 made of elastomeric material or rubber is interposed between the threaded rod 28 and hole 22.

Le manchon 38 est constitué par une jupe cylindrique annulaire 40 et par un collet radial 42 dont la face supérieure 44 est prévue pour venir en appui contre la face inférieure 36 de la tôle 34 et dont la face inférieure 46 s'étend en regard de l'épaulement radial 34 de la vis 26, 28.The sleeve 38 is constituted by a cylindrical skirt annular 40 and by a radial collar 42 whose face upper 44 is provided to come into abutment against the underside 36 of the sheet 34 and whose underside 46 extends opposite the radial shoulder 34 of screw 26, 28.

Une rondelle de serrage 48 est interposée entre la face annulaire inférieure de serrage 31 de l'écrou 30 et la face radiale annulaire d'extrémité 50 de la jupe 40 du manchon d'amortissement 38.A clamping washer 48 is interposed between the lower annular tightening face 31 of the nut 30 and the annular radial end face 50 of the skirt 40 of the cushioning sleeve 38.

La face inférieure 52 de la rondelle 48 présente un chanfrein en relief 54 qui est prévu pour coopérer avec un chanfrein correspondant 56 formé au voisinage de l'extrémité supérieure libre du trou cylindrique interne 58 du manchon d'amortissement 38.The underside 52 of the washer 48 has an embossed chamfer 54 which is intended to cooperate with a corresponding chamfer 56 formed in the vicinity of the free upper end of the internal cylindrical hole 58 of the damping sleeve 38.

Conformément aux enseignements de l'invention, une entretoise de serrage axial 60 est interposée entre l'épaulement radial 34 et la face annulaire de serrage 31 de l'écrou 30, à l'intérieur du manchon 38.In accordance with the teachings of the invention, a axial clamping spacer 60 is interposed between the radial shoulder 34 and the annular tightening face 31 of the nut 30, inside the sleeve 38.

La douille 60 comporte un corps en forme de douille cylindrique tubulaire proprement dite 62 dont le bord radial annulaire supérieur 64 est prévu pour venir coopérer avec la face annulaire inférieure 66 du chanfrein 54 de la rondelle 48.The socket 60 has a body in the form of tubular cylindrical sleeve proper 62 of which the upper annular radial edge 64 is provided to come cooperate with the lower annular face 66 of the chamfer 54 of washer 48.

A son extrémité inférieure 68, la douille 60 se prolonge par une collerette radiale extérieure 70 dont la face supérieure annulaire 72 est prévue pour coopérer avec la face annulaire inférieure 46 du manchon d'amortissement 38 et dont la face annulaire inférieure 74 est prévue pour coopérer avec l'épaulement radial 34 de la vis 26, 28. At its lower end 68, the socket 60 is extended by an external radial flange 70, the annular upper face 72 is provided to cooperate with the lower annular face 46 of the damping sleeve 38 and whose lower annular face 74 is provided for cooperate with the radial shoulder 34 of the screw 26, 28.

Le diamètre extérieur de la jupe 40 du manchon d'amortissement 38 est, avant serrage axial et comme cela est illustré sur la figure 2, légèrement inférieur à celui du trou 22 de manière à permettre la mise en place de la vis équipée de l'entretoise 60 et du manchon d'amortissement 38 verticalement de bas en haut à travers le trou 22.The outside diameter of the skirt 40 of the sleeve damping 38 is, before axial tightening and like that is illustrated in Figure 2, slightly lower than that of the hole 22 so as to allow the establishment of the screw fitted with spacer 60 and sleeve damping 38 vertically from bottom to top across hole 22.

L'assemblage se poursuit en mettant en place la rondelle de serrage 48 et l'écrou 30 sur l'extrémité libre de la tige filetée 28 de la vis.The assembly continues by setting up the tightening washer 48 and nut 30 on the free end of the threaded rod 28 of the screw.

Lors du serrage axial, la rotation de l'écrou 30 provoque le déplacement axial progressif de sa face annulaire inférieure de serrage 31 et de la rondelle 48 axialement vers le bas en considérant la figure 2.During axial tightening, the rotation of the nut 30 causes progressive axial displacement of its face lower clamping ring 31 and washer 48 axially downwards considering figure 2.

Ce déplacement provoque la compression axiale progressive du manchon d'amortissement 38 dont la jupe cylindrique 40 se déforme pour venir épouser en partie la face supérieure 32 de la tôle 24.This displacement causes axial compression progressive of the damping sleeve 38 including the skirt cylindrical 40 deforms to partially marry the upper face 32 of the sheet 24.

La position de serrage axial maximum est déterminée par la venue en butée de la face radiale annulaire d'extrémité 64 de l'entretoise 60 contre la face annulaire inférieure 66 du chanfrein 54 de la rondelle de serrage 48.The maximum axial clamping position is determined by the abutment of the radial face annular end 64 of the spacer 60 against the face lower annular 66 of the chamfer 54 of the washer tightening 48.

Il est alors impossible de serrer axialement l'assemblage au-delà de cette position, la compression axiale du manchon d'amortissement 38 étant ainsi parfaitement maítrisée grâce à la conception selon l'invention.It is then impossible to tighten axially assembly beyond this position, compression axial of the damping sleeve 38 thus being perfectly controlled thanks to the design according to the invention.

Dans la variante de réalisation illustrée à la figure 4, une coupelle 78 de protection de la partie supérieure comprimée de la jupe cylindrique 40 de la douille d'amortissement 38 est agencée entre la rondelle de serrage 48 et la face annulaire inférieure de serrage 31 de l'écrou 30. In the alternative embodiment illustrated in Figure 4, a cup 78 for protecting the part compressed upper of the cylindrical skirt 40 of the cushioning sleeve 38 is arranged between the washer clamping 48 and the annular lower clamping face 31 of nut 30.

Dans les modes de réalisation illustrés aux figures 1 à 4, l'écrou 30 est un écrou classique de forme hexagonale.In the embodiments illustrated in Figures 1 to 4, the nut 30 is a conventional nut of shape hexagonal.

Dans la variante de réalisation illustrée aux figures 5 et 6, l'écrou 30 est un écrou cylindrique de serrage du type à baïonnette comportant un ergot 80 reçu dans une rainure hélicoïdale 82 de la tige 28 du corps de la vis 26.In the variant embodiment illustrated in Figures 5 and 6, the nut 30 is a cylindrical nut of bayonet type tightening with lug 80 received in a helical groove 82 of the rod 28 of the body of screw 26.

Le diamètre extérieur de l'écrou cylindrique 30 et de la rondelle de serrage 48 sont inférieurs au diamètre intérieur du trou 22 de la tôle 24 de manière à permettre l'introduction axiale de l'ensemble des composants du dispositif de serrage de bas en haut en considérant la figure 5 dans le trou 22, l'opérateur n'ayant plus ensuite qu'à serrer l'écrou 30 en provoquant sa rotation pour assurer la fixation de l'ensemble avec compression axiale contrôlée du manchon d'amortissement 38 comme cela est illustré sur la figure 6.The outside diameter of the cylindrical nut 30 and of the clamping washer 48 are less than the diameter inside the hole 22 of the sheet 24 so as to allow the axial introduction of all the components of the clamping device from bottom to top considering the Figure 5 in hole 22, the operator then no longer having that tighten the nut 30 by causing its rotation to secure the assembly with axial compression of the cushioning sleeve 38 as is illustrated in figure 6.

Le dispositif de fixation selon l'état de la technique illustré aux figures 7 à 8 diffère du principe exposé précédemment en ce que l'épaulement 34 n'est pas formé directement sur le corps 26 de la vis qui se termine par la tige filetée mais sur une virole 84 qui prend appui contre la face annulaire 86 de la tête à six pans 88 de la vis.The fixing device according to the state of the technique illustrated in Figures 7 to 8 differs from the principle explained above in that the shoulder 34 is not formed directly on the body 26 of the screw which ends by the threaded rod but on a ferrule 84 which is supported against the annular face 86 of the hexagon head 88 of the screw.

Le manchon d'amortissement 38 comporte une gorge 90 de dimension correspondante à celle du trou 22 de la tôle 24 et il comporte une partie chanfreinée 92 facilitant l'introduction à force de la tôle 24 dans la gorge 90.The damping sleeve 38 has a groove 90 of dimension corresponding to that of hole 22 of the sheet 24 and it has a chamfered part 92 facilitating the forced insertion of the sheet 24 into the throat 90.

L'écrou 30 est ici noyé à l'intérieur du manchon d'amortissement 38 et le serrage est obtenu par vissage du goujon 26, 28, 88 qui provoque, comme cela est illustré sur la figure 8, le déplacement axial de l'écrou 30 en direction de la surface radiale d'appui 34 provoquant la compression du manchon 38.The nut 30 is here embedded inside the sleeve damping 38 and tightening is obtained by screwing the stud 26, 28, 88 which causes, as illustrated in FIG. 8, the axial displacement of the nut 30 in direction of the radial bearing surface 34 causing the compression of the sleeve 38.

Une rondelle 94 peut être interposée entre la surface radiale d'appui 34 de la virole 84 et la face annulaire d'extrémité 46 du manchon 38 afin d'accroítre la surface de portée et de serrage.A washer 94 can be interposed between the radial bearing surface 34 of the shell 84 and the face annular end 46 of the sleeve 38 in order to increase the bearing and clamping surface.

Conformément à l'invention, et comme cela est illustré aux figures 10 à 11, une entretoise de serrage axial en forme de douille 60 est agencée à l'intérieur de l'alésage cylindrique 58 du manchon d'amortissement 38.According to the invention, and as is illustrated in Figures 10 to 11, a clamping spacer sleeve-shaped axial 60 is arranged inside the cylindrical bore 58 of the damping sleeve 38.

L'extrémité 68 de l'entretoise 60 prend appui contre une collerette en forme de rondelle 70 interposée entre la rondelle 94 et la surface radiale d'appui 34 de la virole 84 tandis que le bord annulaire d'extrémité 64 de la douille 60 est susceptible de venir coopérer avec la face radiale annulaire de serrage 31 de l'écrou noyé 30.The end 68 of the spacer 60 is supported against a washer-shaped collar 70 interposed between the washer 94 and the radial bearing surface 34 of the ferrule 84 while the annular end edge 64 of the socket 60 is likely to come to cooperate with the radial annular tightening face 31 of the sunken nut 30.

En position serrée, et comme cela est illustré sur la figure 11, la venue en butée de l'écrou 30 contre l'entretoise en forme de douille 60 permet de maítriser parfaitement l'effort de compression axial du manchon d'amortissement 38 conformément aux enseignements de l'invention.In the clamped position, and as illustrated in Figure 11, the abutment of the nut 30 against the sleeve-shaped spacer 60 allows control perfectly the axial compression force of the sleeve amortization 38 in accordance with the teachings of the invention.

Dans la variante de réalisation illustrée sur la figure 12, la douille tubulaire 60 est réalisée venue de matière en une seule pièce avec la collerette 70.In the variant illustrated on the Figure 12, the tubular sleeve 60 is made from material in one piece with the collar 70.

Dans la variante de réalisation illustrée aux figures 13 à 15, l'entretoise en forme de douille tubulaire 60 est réalisée venue de matière avec l'écrou noyé 30 et elle s'étend axialement depuis la face radiale annulaire de serrage 31 de l'écrou en direction de la rondelle 94.In the variant embodiment illustrated in Figures 13 to 15, the socket-shaped spacer tubular 60 is made integrally with the nut embedded 30 and it extends axially from the radial face tightening ring 31 of the nut towards the washer 94.

A la fin du serrage, le bord radial annulaire d'extrémité 68 de l'entretoise en forme de douille 60 vient en butée contre la face en vis-à-vis de la rondelle 94 comme cela est illustré sur la figure 14. At the end of tightening, the annular radial edge end 68 of sleeve-shaped spacer 60 comes into abutment against the face opposite the washer 94 as illustrated in FIG. 14.

La présente invention peut être appliquée à titre non limitatif à la fixation d'un élément appartenant à un mécanisme d'essuie-glace sur la caisse d'un véhicule automobile.The present invention can be applied as not limiting to the fixing of an element belonging to a wiper mechanism on the body of a vehicle automobile.

Claims (11)

  1. A device for fastening an element of a screen wiper on the body (24) of a motor vehicle, of the type comprising a bolt and nut assembly (26, 28, 30), the threaded bolt shank (28) of which passes through a hole (22) formed in a metal plate element (24) with a damping sleeve (38) being interposed, the damping sleeve being, when the device is in a tightened condition, compressed axially between an annular radial thrust surface (34) formed on the body (26) of the threaded bolt (28), and an annular tightening face (31) of the nut (30), a gripping washer (38) being interposed between the annular tightening face (31) of the nut (30) and the damping sleeve (38, 50), with a tightening spacer (60, 62) being arranged axially between the radial thrust surface (34) and the tightening washer (48) for the nut (30), characterised in that the face (52) of the tightening washer (48) that faces towards the damping sleeve (38) includes a chamfered profile (54) formed in relief thereon, which guides the deformation of the damping sleeve (38) during the axial tightening operation.
  2. A device according to Claim 1, characterised in that, in the tightened position, the spacer (60, 64) is in axial engagement against a portion (66) of the tightening washer (48, 54) in facing relationship with it.
  3. A device according to Claim 1, characterised in that the spacer (60) is made in the form of a sleeve coaxial with the damping sleeve (38).
  4. A device according to Claim 3, characterised in that the spacer sleeve (60) is arranged inside the damping sleeve (38).
  5. A device according to Claim 3 or Claim 4, characterised in that the radial thrust surface is a flat annular collar portion (70) which bears against a radial shoulder (34) of the threaded bolt.
  6. A device according to Claim 5 taken in combination with Claim 3 or Claim 4, characterised in that the collar portion (70) is made integrally with the spacer sleeve (60).
  7. A device according to Claim 5 taken in combination with Claim 3 or Claim 4, characterised in that the spacer sleeve (60) bears axially against a radial thrust surface of the collar portion (70).
  8. A device according to any one of the preceding Claims, characterised in that, in a non-tightened condition, the outside diameters of the nut (30) and the damping sleeve (38) are smaller than the diameter of the hole (22).
  9. A device according to Claim 8 taken in combination with either Claim 1 or Claim 2, characterised in that the outer diameter of the tightening washer (48) is smaller than the diameter of the hole (22).
  10. A device according to Claim 4, characterised in that the spacer sleeve (60) is formed integrally as a single component with the nut (30).
  11. A device according to Claim 10, characterised in that the nut (30) is encapsulated within the damping sleeve (38).
EP95118475A 1994-11-30 1995-11-23 Device for fastening an element on a body of a motor vehicle Expired - Lifetime EP0715086B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9414493A FR2727478B1 (en) 1994-11-30 1994-11-30 DEVICE FOR FIXING AN ELEMENT ON THE BODY OF A MOTOR VEHICLE
FR9414493 1994-11-30

Publications (2)

Publication Number Publication Date
EP0715086A1 EP0715086A1 (en) 1996-06-05
EP0715086B1 true EP0715086B1 (en) 1999-06-30

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EP95118475A Expired - Lifetime EP0715086B1 (en) 1994-11-30 1995-11-23 Device for fastening an element on a body of a motor vehicle

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US (1) US5683215A (en)
EP (1) EP0715086B1 (en)
DE (1) DE69510524T2 (en)
ES (1) ES2135645T3 (en)
FR (1) FR2727478B1 (en)

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Also Published As

Publication number Publication date
DE69510524D1 (en) 1999-08-05
FR2727478B1 (en) 1997-04-04
ES2135645T3 (en) 1999-11-01
US5683215A (en) 1997-11-04
EP0715086A1 (en) 1996-06-05
FR2727478A1 (en) 1996-05-31
DE69510524T2 (en) 1999-10-28

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